>> the nra has been notably silent since the attacks on friday. what about retail stores? sporting goods stores that sell these guns? any actions or statements from them? >> reporter: dick's sporting goods, a major chain, is banning certain types of rifles. >> all right. that's one step. we'll keep our ears posted to see if anything changes. pierre thomas, thank you very much. >>> we're going to turn to the health scare for hillary clinton. she suffered a concussion after fainting in her home. on the mend now, she may be out of action for most of her remaining time as secretary of state. reena ninan has the details. >> reporter: hillary clinton has earned a new title under the obama administration. most traveled secretary of state. but it's one she's now paying for. clinton is recovering after affects from a mild concussion. this is the second time in eight years clinton has fainted because of a stomach bug. but in an interview with abc's barbara walters, before the concussion, clinton said that her age and health do not concern her. >> i'm not only healthy but have incred